accelerants/via/Overlay.c

12 /* define the supported overlay input colorspaces */
28 	/* apparantly overlay count should report the number of 'overlay units' on the card */
78 	AQUIRE_BEN(si->overlay.lock)
87 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
99 					si->overlay.myBuffer[offset].width = ((width + 0x0007) & ~0x0007);
100 					si->overlay.myBuffer[offset].bytes_per_row = 2 * si->overlay.myBuffer[offset].width;
104 					if (si->overlay.myBuffer[offset].width > 4088)
109 						RELEASE_BEN(si->overlay.lock)
119 					RELEASE_BEN(si->overlay.lock)
126 		if (si->overlay.myBuffer[offset].width > 1024)
131 			RELEASE_BEN(si->overlay.lock)
141 			RELEASE_BEN(si->overlay.lock)
146 		/* store slopspace (in pixels) for each bitmap for use by 'overlay unit' (BES) */
147 		si->overlay.myBufInfo[offset].slopspace = si->overlay.myBuffer[offset].width - width;
149 		si->overlay.myBuffer[offset].space = cs;
150 		si->overlay.myBuffer[offset].height = height;
152 		/* we define the overlay buffers to reside 'in the back' of the cards RAM */
154 		 * Beware that an app using overlay needs to track workspace switches and screenprefs
156 		 * newly created overlay bitmaps, which will be assigned by BeOS automatically after such
162 		 * and if this happens, it needs to fallback to single buffered overlay or even fallback to
166 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
181 		oldsize = si->overlay.myBufInfo[offset].size;
182 		si->overlay.myBufInfo[offset].size =
183 			si->overlay.myBuffer[offset].bytes_per_row * si->overlay.myBuffer[offset].height;
188 		 * that do not have enough cardRAM left for allocation of overlay bitmaps, you need a card with
194 		 * bitmap output or maybe single buffered overlay output if small bitmaps are used. */
199 			adress -= si->overlay.myBufInfo[cnt].size;
212 			si->overlay.myBufInfo[offset].size += (temp32 - (temp32 & 0xfffffff0));
224 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
226 		 * space in between your overlay buffers for instance, so cardRAM is used 'to the max'.
233 			if (si->overlay.myBuffer[cnt].buffer != NULL)
236 				if (si->overlay.myBufInfo[offset].size <= oldsize)
240 					adress -= (oldsize - si->overlay.myBufInfo[offset].size);
241 					si->overlay.myBufInfo[offset].size = oldsize;
254 					si->overlay.myBufInfo[offset].size = oldsize;
257 					RELEASE_BEN(si->overlay.lock)
265 		 * (preventing overlap of desktop RAMspace & overlay bitmap RAMspace here) */
272 			RELEASE_BEN(si->overlay.lock)
277 		si->overlay.myBuffer[offset].buffer = (void *) adress;
283 			adress -= si->overlay.myBufInfo[cnt].size;
286 		si->overlay.myBuffer[offset].buffer_dma = (void *) adress;
289 			(uint8*)si->overlay.myBuffer[offset].buffer,
290 			(uint8*)si->overlay.myBuffer[offset].buffer_dma, cs));
291 		LOG(4,("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
294 		RELEASE_BEN(si->overlay.lock)
296 		return &si->overlay.myBuffer[offset];
304 		RELEASE_BEN(si->overlay.lock)
320 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
326 			si->overlay.myBuffer[offset].buffer = NULL;
327 			si->overlay.myBuffer[offset].buffer_dma = NULL;
367 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
451 	AQUIRE_BEN(si->overlay.lock)
453 	/* overlay unit already in use? */
454 	if (si->overlay.myToken == NULL)
455 	/* overlay unit is available */
459 		si->overlay.myToken = &tmpToken;
462 		RELEASE_BEN(si->overlay.lock)
464 		return si->overlay.myToken;
467 	/* sorry, overlay unit is occupied */
472 		RELEASE_BEN(si->overlay.lock)
483 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
498 		si->overlay.myToken = NULL;
511 	 * When a Workspace switch, screen prefs change, or overlay app shutdown occurs, BeOS will
512 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
526 	 * If during overlay use the screen prefs are changed, or the workspace has changed, it
527 	 * may be that we were not able to re-allocate the requested overlay buffers (or only partly)
535 		LOG(4,("no overlay buffer specified\n"));
541 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
554 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
561 			/* program overlay hardware */